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From Ted Dunning <>
Subject Re: TU Berlin Winter of Code Project
Date Fri, 06 Nov 2009 19:54:43 GMT
Named entity extraction and feature extraction are both going to be very
challenging in the web environment.

On Fri, Nov 6, 2009 at 11:47 AM, Grant Ingersoll <>wrote:

>> II. Layer: Preprocessing
>> The data is probably not structured enough to be directly processable
>> by a machine, so it has to be preprocessed. This
>> step could e.g. consist of extracting the blog fulltext from the
>> crawl, stemming it, finding named entitites and tagging them.
>> We currently think of using UIMA for this layer.
> This could likely be done as M/R jobs too and contributed to Mahout utils
> module if so desired.
>> III. Layer: Feature extraction
>> In order to use clustering algorithms. we need to perform a feature
>> extraction. This could e.g. consist of generating feature vectors, a
>> similiarity matrix, a link graph, etc. The goal of this layer is to
>> have a representation of the web crawl that can be processed by
>> Mahout. The feature extraction will likely be implemented via a
>> custom-written Hadoop job.
> It will be really useful to hear your feedback on what works and doesn't
> here, especially on noisy web data.

Ted Dunning, CTO

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